[rtems commit] powerpc/motorola_powerpc: Add cache coherent memory to the allocator

[Chris Johns]

Module:    rtems
Branch:    master
Commit:    026eb3db7e61ed29ff3b676c126168bf08dfe0a8
Changeset: http://git.rtems.org/rtems/commit/?id=026eb3db7e61ed29ff3b676c126168bf08dfe0a8

Author:    Chris Johns <chrisj at rtems.org>
Date:      Mon Feb 15 12:27:14 2021 -1000

powerpc/motorola_powerpc: Add cache coherent memory to the allocator

Updates #4245
Updates #4243

---

 bsps/powerpc/motorola_powerpc/start/bspstart.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/bsps/powerpc/motorola_powerpc/start/bspstart.c b/bsps/powerpc/motorola_powerpc/start/bspstart.c
index ef8418e..a781297 100644
--- a/bsps/powerpc/motorola_powerpc/start/bspstart.c
+++ b/bsps/powerpc/motorola_powerpc/start/bspstart.c
@@ -44,6 +44,9 @@ extern void set_L2CR(unsigned);
 extern Triv121PgTbl BSP_pgtbl_setup(unsigned int *);
 extern void			BSP_pgtbl_activate(Triv121PgTbl);
 
+#define PPC_MIN_BAT_SIZE (128 * 1024)
+static char cc_memory[PPC_MIN_BAT_SIZE] RTEMS_ALIGNED(PPC_MIN_BAT_SIZE);
+
 SPR_RW(SPRG1)
 
 #if defined(DEBUG_BATS)
@@ -351,6 +354,9 @@ static void bsp_early( void )
     setdbat(3, 0, 0, 0, 0);
   }
 
+  setdbat(3, (intptr_t) &cc_memory[0], (intptr_t) &cc_memory[0], PPC_MIN_BAT_SIZE, IO_PAGE);
+  rtems_cache_coherent_add_area(&cc_memory[0], PPC_MIN_BAT_SIZE);
+
 #if defined(DEBUG_BATS)
   ShowBATS();
 #endif